Weir shutter



Nov. 8, 1932. F.'JERMAR WEIR SHUTTER Filed June 27, 1930 1327/6 for.- WW

Patented Nov. 8, 1932 UNITED STATES maurrsmr JERMAR, or OIEAVA, CZECHOSLOVAKIA 'wnm seems Application filed June 27, 1930, Serial N 464,403, and in Czechoslovakia. April 26; 1930.

The object of the present invention is to produce a hydrostatic weir shutter which presents a comparatively narrow structure as compared with .the vertical adjustability of the shutter and which will operate without auxiliary mechanisms, and the invention 0011- I sists in mounting two arcuate leaves at opposite sides of a sub-structure so as to overlap across the latter, the leaves being provided at their free ends with rollers whereby each leaf is guided on and abuts against the other.-

Fig. 1 of the accompanying drawing represents a cross-sectional view of the shutter, and

Fig. 2 is a cross-sectional view showing the leaves slightly modified inform.

' The shutter comprises a sub-structure 5 provided with a well acrosswhich two arouate leaves 1 and 2 overlap, the leaves being p Y I -1. A hydrostatic Weir shutter comprlslng hinged at 3 and4 respectively to opposite channel 12 With the high and through a chani nel 13 with the low water. One channel is provided with a valve 10 and the other with a valve 11 wherebyeither communication can be cut ofi, WVhen the valve 11 is closed and the valve 10 opened water 7 enters the well from the high Water side and raises the shutter. When the valve 10 is closed and the valve 11 opened, the water leaves the well and allows the shutter to drop.

The leaf 1 is extended beyond the flange 3, and the extension 6 limits the upward move? ment of the leaves b abutmentra 'ainst a shoulder 9 on the sub-structure. The latter is formed with a chamber between the ends, the free end ofthe conipanion'leaf; It will therefore not with a considerable leverage on the companion leaf ing the shutter.

' by the action of the overflowing water on the extension 6 of the leaf 1. f V

sides of the sub-structure. An orifice at the bottom of the well communicates through a 14 whence the at the initial and mostdithcult stage of rais- V The raising of the leaves from this position is still further facilitated In an intermediateposition, 1" and '2",

of the leaves, the overlapping portions of the latter lieflat against each other, and in the upper positions of the leaves, the leaf 2 bears with itsinner surface against the free end of the leaf 1. e The leaves 1 and 2 are fitted at their free .e ends with anti-friction rollers 7 and 8 respec tively which take the thrust. 1

I It will be observed that the hinges and 4 are arranged 011 substantially the same level V and that the leaves form together a substantially unbrokensurface over which lumps ofice and the like can pass without setting'up V detrimental shocks;

The leaves may either be uniformly C5 V curved as shown in Fig. 1, or bent at an angle asshown in Fig. 2. e 1

-Iclaim:. r

against the bottom of the well and cover the 50 channel orifice, and anti-friction rollers connected to the free ends of both leaves as guide and thrust elements, the'leaf at the high waterside being adapted to bear with its free end 1 against the outer surface ofthe com panion leaf in the lower position-of-the shutter and with its inner-surface against the free end of thecompanion leaf in the upper posi. tion thereof.

2. weir shutter as claimed'in claim 1 adapted, by abutment against the sub-structure, to-limitfthe upward movement of the leaves. a

,FRANTISEK JERMAR, 

